Most fertile is the superlative for fertile.
more fertile
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
most superlative is the superlative form of superlative
superlative of quiet
comparative tinier superlative tiniesttinier
Longest is the superlative.
more fertile, most fertile
The most common meanings are "very fruitful" or "most fruitful," and "very fertile" and "most fertile." It's the superlative of the adjective "fecundus, -a, -um."
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
The superlative for willing would be "most willing." There is no one-word superlative.
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
"Bib" is a noun and, as such, does not have a superlative form.
most superlative is the superlative form of superlative
Tallest is the superlative.
superlative of quiet
bigger is the comparativebiggest is the superlative
smallest is the superlative. (est is the standard superlative ending._
The superlative of clear is clearest.